Electromagnetic brake



M. E. GYSEL. ELECTROMAGPJETW BRAKEJ APPLICATION FILED 1mm 1a. 19]].

ZVSHEETS-SHEET Patented Feb. 15, 1921.

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' INVENTOR Max '5 Gysefl WITNESSES:

ATTORNEY M. E. GYSEL.

ELECTROMAGNETIC BRAKE. APPLICATION FILED JUNE I3, 1917.

1,368,336. Patented Feb. 15, 1921.

2 SHEETS-SHEET 2- WITNESSES: INVENTOR 6M 4 Max 5 AILTORNEY MAX E. GYSEL,F WILKTNSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC aMANUFACTURING COMPANY, A CORPORATION OF YENNSYLVANIA,

ELECTROMAGNETIC BRAKE.

1,368,336 Specification of Letters Patent. Patented F b, 15 1921Application flied June 13, 1917. Serial No. 174,458.

To allwkom it may concern. frame in any suitable manner, supports the Beit known that 1, MAX E. GYsnL, a citibrake structure.

zen of the Republic of Switzerland, and a Two brake shoes 5, which arelined with resident of Wilkinsburg, in the county of suitable frictionmaterial indicated at 6, are

Allegheny and State of Pennsylvania, have pivotally supported upon pins7 The piv- 60 invented a new and useful Improvement in otal supports forthe brake shoes 5 are Electromagnetic Brakes, of which the fol.- catedat such points that the force of gravity lowing is a specification.tends to actuate them from thebrake wheel My invention relates toelectromagnetic 3. Each of the brake shoes 5 is controlled 1O brakes,and it has for its object to provide pjy a lever 8 having a pivotalsupport 9. 65 a simple and efficient arrangement whereby ach of thelevers 8 is provided with an adthe relative positions of the parts maybe justable pin or bolt 10 for engaging the coradjusted to compensatefor wear of the responding brake shoe 5. b k h Normally, the levers 8are retained by In the construction of brakes of the same springs 11 insuch position as to efl'ect the 70 general character as that of themechanisms engagement of the brake shoes 5 and the covered by thepresent application, it is cuswheel 3. The releasing means for the braketomary to mount the brake shoes upon the comprises an clectrom'agnethaving a coil pivotally-mounted levers that are controlled 12 and coremembers 13 that may, for exby electromagnets or other suitable powerample, constitute integral parts of the 75 devices. lt is necessary toprovide some levers 8. o means for adjusting the normal positionsNormally, the various parts occupy their of the lovers in order that theair gaps of respective illustrated. positions, with the theelectromagnets may be adjusted to combrake shoes in engagement with thebrake pensate for changes incident to the wear of wheel 3. When it isdesired to operate the 80 the brake shoes. This construction may, motoror other machine in connection with for example, take the form of meansfor adwhich the brake is employed, the circuit of justing the positionsof the pivotal supports the coil 12 is completed by any suitable of thebrake levers relative y to the brake means (not shown) and the coremembers wheel and to each other. 13 are drawn toward each other toactuate at l provide an arrangement in whichthe the levers 8 about theirrespective points of hrake shoes are pivotally supported indepivotalsupport. The brake shoes 5 are ac pendently oil the brake levers. Thebrake cordingly permitted to fall away from the shoes are disengagedfrom the brake wheel brake wheel 3 by force of gravity.

by the i'orce of gravity when the brake Whenthe circuit of the coil 12is opened, ac levers are released by the electromagnets. the latter isdenergized and the springs 11,- The brake levers are provided withadjustwhich were placed under compression, again able members forengaging the brake shoes. eflect engagement of the,bral e shoes with Thebrake levers and the brake shoes are, the coacting brake wheel in orderto bring 40 however, movable independently of each the mechanism torest' and to prevent moveas other. it is only necessary to adjust theenment of the latter except at desired times. gaging members of thebrake levers in order In case the brake linings 5 become worn to securea corresponding adjustment of the during the normal operation of thebrake, lengths of the air gaps of the electromag the brake shoes 5 andthe levers 8 occupy 4s mtg, such positionsthat the air gap between theice in the accompanying drawings, Figure 1 ends of the core members "13is materially is an end view, partially in elevation and increased. Theefiective pull of the electropartially in section, of an electromagneticmagnet is decreased to a corresponding brake constructed in accordancewith my indegree. Tn order to compensate for the vention. Fig. 2 is aside view, similar to wear of the brake linings and to maintain Fig. 1,of the brake mechanism. the various parts in their proper relations, it

An electric motor 1, the outline of which is only necessary to adjustthe members 10 is shown in Fig. 1, has a shaft 2 upon which with anordinary wrench. This operation is mounted a brake wheel 3. A framememmay be performed without the removal of 5 oer 4:, which may besecured to the motor any of the brake parts or without in any said brakeshoes I brake wheel, and a way interfering with the brake. The above andother advantages will be apparent to those skilled in the art to whichmy invention appertains.

I claim as my invention: a

-1. In a brake, the combination with a brake wheel, a pair of pivotallysupported brake shoes and a pair of pivotally mounted levers, saidlevers being mounted on opposite sides of said brake wheel, of springsfor biasing said levers to engage to effect operative engagement withsaid brake wheel and an electromagnet for actuating both of said levelsin opposition to said springs to permit said brake shoes to be releasedby the force of gravity.

2. In a brake, the combination with a brake shoe having a pivotalsupport and adapted to be actuated to position by the force of gravity,of actuating means therefor comprising a biased pivotally mounted leverhaving a portion for engaging said shoe but independently movablerelatively thereto.

3. In a brake, the combination with a coacting brake shoe having apivotal support so arranged that the force of gravity tends to actuatesaid shoe from said wheel, of a pivotally-mounted lever having anadjustable member engageoperation of the an inoperative I assesseablewith, but movable independently relatively to, said shoe, and means foractuating said lever in both directions about its point of support,

4. In a brake, the combination with a brake wheel, a pair of pivotallysupported brake shoes and a pair of pivotally mounted levers, saidlevers being mounted on opposite sides of said brake wheel, of springsfor acting upon one end of each of said levers to effect the engagementof said brake shoes with saidbrake wheel and an electromagnet for actingupon the opposite ends of said levers to release saidbrake shoes topermit them to be actuated to their inoperative positions by the forceof-gravity.

5. The combination with a, brake wheel, and a brake shoe adapted to beactuated out of engagement therewith by the force of gravity, of amember movable independently of said shoe and adapted to engage saidshoe to actuate it into engagement with said wheel, means for normallyeffecting engagement of said member with said shoe, and means forreleasing said normally efiective means. 7

In testimony whereof, I have hereunto sub ecribed my name this 28th dayof May 191 X E. GYSEL.

